Former Penn State University President Graham Spanier on Oct. 27, 2007 in University Park, Pa.

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(CBS) PITTSBURGH, Pa. - High-ranking Penn State officials may have known more about the accusations of sex abuse against former assistant football coach Jerry Sandusky than they told the grand jury, according to documents filed by the Attorney General's office on Monday, reports CBS Pittsburgh.

In documents obtained by KDKA-TV reporters, the Attorney General's Office indicates former vice president Gary Schultz kept a secret file with allegations regarding former assistant football coach Jerry Sandusky and sex abuse.

This comes after an NBC report claiming former Penn State president Graham Spanier and Schultz decided not to report the alleged abuse to law enforcement because it would be "humane" to Sandusky not to do so.

"Only recently was the commonwealth provided with a file containing documents relating to incidents involving Sandusky," a statement from the Attorney General's office says. "The file was created, maintained and possessed by Gary Schultz. Documents in that file are inconsistent with statements by Schultz and his co-defendant, (former athletic director Tim) Curley, to the Grand Jury.

"Also, the commonwealth has come into possession of computer data (again, subpoenaed long ago but not received from PSU until after the charges had been filed in this case) in the form of e-mails between Schultz, Curley and others that contradict their testimony before the Grand Jury."

Sources close to the investigation confirm both e-mails in the file kept by Schultz as well as e-mails found in computer data indicate high-ranking Penn State officials, including Spanier, Schultz and former athletic director Tim Curley, knew about an alleged sexual assault that took place in the Penn State locker room shower.

Those documents filed by the Attorney General's office late Monday indicate Schultz told so many lies in his Grand Jury testimony that it was impossible to respond to each and every one of them.

Penn State says the e-mails were discovered and immediately turned over.